I'm discovering that WORM is a world in itself.
After taking forever to try to image a 470MB disc and taking forever to
do it because of automatic retries on unwritten sectors, I've discovered
that WORM has a SCSI2 command that's unique to it--38H, "Medium Scan"
which can be used to identify
On 13/02/2021 09:03, Paul Anderson via cctalk wrote:
I think the DEC one was the RX20 or RZ20. It will take a while to find it,
but I'll check the model number..
Paul
The DEC RV20 was announced in 1988. Those were quite large as I recall
(bigger than an LP). ~2GB write-once.
There was the
I think the DEC one was the RX20 or RZ20. It will take a while to find it,
but I'll check the model number..
Paul
On Fri, Feb 12, 2021 at 2:12 PM jim stephens via cctalk <
cctalk@classiccmp.org> wrote:
>
>
> On 2/12/2021 11:46 AM, Chuck Guzis via cctalk wrote:
> > On 2/11/21 9:31 AM, Chuck
On 2/12/21 2:10 PM, jim stephens via cctalk wrote:
> The company I'm thinking of had 5 1/4" drive, and appropriate media
> size. I think your 400 or 500mb size rings familiar.
There were several; the one I'm working with is 470/470MB double-sided
5.25" Very similar in size and looks to a PMC
On 2/12/2021 1:30 PM, Chuck Guzis via cctalk wrote:
On 2/12/21 12:21 PM, Paul Koning via cctalk wrote:
On Feb 12, 2021, at 3:12 PM, jim stephens via cctalk
wrote:
There was a company who made a drive with glass media that a friend of ours
repped for.
It used a repurposed CD head
On Fri, 12 Feb 2021 at 21:12, jim stephens via cctalk
wrote:
>
> My partner passed away about 2 weeks ago and would possibly have
> recalled who it was, but can't ask now. I'll try a scan of our contact
> files and see if "opti" anything shows up.
Oh, I am sorry to hear that. My condolences.
On 2/12/21 12:21 PM, Paul Koning via cctalk wrote:
>
>
>> On Feb 12, 2021, at 3:12 PM, jim stephens via cctalk
>> wrote:
>>
>>
>> There was a company who made a drive with glass media that a friend of ours
>> repped for.
>>
>> It used a repurposed CD head which was driven hard enough to write
> On Feb 12, 2021, at 3:12 PM, jim stephens via cctalk
> wrote:
>
>
> There was a company who made a drive with glass media that a friend of ours
> repped for.
>
> It used a repurposed CD head which was driven hard enough to write their
> media. it was sold as being able to be written
On 2/12/2021 11:46 AM, Chuck Guzis via cctalk wrote:
On 2/11/21 9:31 AM, Chuck Guzis via cctalk wrote:
I have a bunch of Panasonic/Matsushita 470/940 MB phase-change WORM
discs here--and the appropriate drive (Panasonic LF-5010 SCSI-2) to read
them.
After some digging, I did find that
On 2/11/21 9:31 AM, Chuck Guzis via cctalk wrote:
> I have a bunch of Panasonic/Matsushita 470/940 MB phase-change WORM
> discs here--and the appropriate drive (Panasonic LF-5010 SCSI-2) to read
> them.
After some digging, I did find that Optisys offered a driver for DOS as
late as 2008, called
I have a bunch of Panasonic/Matsushita 470/940 MB phase-change WORM
discs here--and the appropriate drive (Panasonic LF-5010 SCSI-2) to read
them.
Unlike CD-R media, however, the format of these discs is not anything
standard--they were essentially treated as hard disks. So, adding a
file
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